#!/usr/bin/env python import unittest import binascii from socket import AF_INET6 from framework import VppTestCase, VppTestRunner from vpp_ip_route import VppIpRoute, VppRoutePath, FibPathProto, VppIpTable from vpp_srv6 import SRv6LocalSIDBehaviors, VppSRv6LocalSID, VppSRv6Policy, \ SRv6PolicyType, VppSRv6Steering, SRv6PolicySteeringTypes import scapy.compat from scapy.packet import Raw from scapy.layers.l2 import Ether, Dot1Q from scapy.layers.inet6 import IPv6, UDP, IPv6ExtHdrSegmentRouting from scapy.layers.inet import IP, UDP from scapy.utils import inet_pton, inet_ntop from util import ppp class TestSRv6(VppTestCase): """ SRv6 Test Case """ @classmethod def setUpClass(cls): super(TestSRv6, cls).setUpClass() @classmethod def tearDownClass(cls): super(TestSRv6, cls).tearDownClass() def setUp(self): """ Perform test setup before each test case. """ super(TestSRv6, self).setUp() # packet sizes, inclusive L2 overhead self.pg_packet_sizes = [64, 512, 1518, 9018] # reset packet_infos self.reset_packet_infos() def tearDown(self): """ Clean up test setup after each test case. """ self.teardown_interfaces() super(TestSRv6, self).tearDown() def configure_interface(self, interface, ipv6=False, ipv4=False, ipv6_table_id=0, ipv4_table_id=0): """ Configure interface. :param ipv6: configure IPv6 on interface :param ipv4: configure IPv4 on interface :param ipv6_table_id: FIB table_id for IPv6 :param ipv4_table_id: FIB table_id for IPv4 """ self.logger.debug("Configuring interface %s" % (interface.name)) if ipv6: self.logger.debug("Configuring IPv6") interface.set_table_ip6(ipv6_table_id) interface.config_ip6() interface.resolve_ndp(timeout=5) if ipv4: self.logger.debug("Configuring IPv4") interface.set_table_ip4(ipv4_table_id) interface.config_ip4() interface.resolve_arp() interface.admin_up() def setup_interfaces(self, ipv6=[], ipv4=[], ipv6_table_id=[], ipv4_table_id=[]): """ Create and configure interfaces. :param ipv6: list of interface IPv6 capabilities :param ipv4: list of interface IPv4 capabilities :param ipv6_table_id: list of intf IPv6 FIB table_ids :param ipv4_table_id: list of intf IPv4 FIB table_ids :returns: List of created interfaces. """ # how many interfaces? if len(ipv6): count = len(ipv6) else: count = len(ipv4) self.logger.debug("Creating and configuring %d interfaces" % (count)) # fill up ipv6 and ipv4 lists if needed # not enabled (False) is the default if len(ipv6) < count: ipv6 += (count - len(ipv6)) * [False] if len(ipv4) < count: ipv4 += (count - len(ipv4)) * [False] # fill up table_id lists if needed # table_id 0 (global) is the default if len(ipv6_table_id) < count: ipv6_table_id += (count - len(ipv6_table_id)) * [0] if len(ipv4_table_id) < count: ipv4_table_id += (count - len(ipv4_table_id)) * [0] # create 'count' pg interfaces self.create_pg_interfaces(range(count)) # setup all interfaces for i in range(count): intf = self.pg_interfaces[i] self.configure_interface(intf, ipv6[i], ipv4[i], ipv6_table_id[i], ipv4_table_id[i]) if any(ipv6): self.logger.debug(self.vapi.cli("show ip6 neighbors")) if any(ipv4): self.logger.debug(self.vapi.cli("show ip arp")) self.logger.debug(self.vapi.cli("show interface")) self.logger.debug(self.vapi.cli("show hardware")) return self.pg_interfaces def teardown_interfaces(self): """ Unconfigure and bring down interface. """ self.logger.debug("Tearing down interfaces") # tear down all interfaces # AFAIK they cannot be deleted for i in self.pg_interfaces: self.logger.debug("Tear down interface %s" % (i.name)) i.admin_down() i.unconfig() i.set_table_ip4(0) i.set_table_ip6(0) @unittest.skipUnless(0, "PC to fix") def test_SRv6_T_Encaps(self): """ Test SRv6 Transit.Encaps behavior for IPv6. """ # send traffic to one destination interface # source and destination are IPv6 only self.setup_interfaces(ipv6=[True, True]) # configure FIB entries route = VppIpRoute(self, "a4::", 64, [VppRoutePath(self.pg1.remote_ip6, self.pg
---
name: Bidirectional Forwarding Detection
maintainer: Klement Sekera <ksekera@cisco.com>
features:
  - BFD protocol implementation
description: "An implementation of Bidirectional Forwarding Detection (BFD)."
state: production
properties: [API, CLI, STATS, MULTITHREAD]
icy.bsid, prefix="::", mask_width=0, traffic_type=SRv6PolicySteeringTypes.SR_STEER_L2, sr_policy_index=0, table_id=0, sw_if_index=self.pg0.sw_if_index) pol_steering.add_vpp_config() # log the sr steering policies self.logger.info(self.vapi.cli("show sr steering policies")) # create packets count = len(self.pg_packet_sizes) pkts = [] # create L2 packets without dot1q header packet_header = self.create_packet_header_L2() # create traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header, self.pg_packet_sizes, count)) # create L2 packets with dot1q header packet_header = self.create_packet_header_L2(vlan=123) # create traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header, self.pg_packet_sizes, count)) # send packets and verify received packets self.send_and_verify_pkts(self.pg0, pkts, self.pg1, self.compare_rx_tx_packet_T_Encaps_L2) # log the localsid counters self.logger.info(self.vapi.cli("show sr localsid")) # remove SR steering pol_steering.remove_vpp_config() self.logger.info(self.vapi.cli("show sr steering policies")) # remove SR Policies self.sr_policy.remove_vpp_config() self.logger.info(self.vapi.cli("show sr policies")) # remove FIB entries # done by tearDown # cleanup interfaces self.teardown_interfaces() def test_SRv6_End(self): """ Test SRv6 End (without PSP) behavior. """ # send traffic to one destination interface # source and destination interfaces are IPv6 only self.setup_interfaces(ipv6=[True, True]) # configure FIB entries route = VppIpRoute(self, "a4::", 64, [VppRoutePath(self.pg1.remote_ip6, self.pg1.sw_if_index)]) route.add_vpp_config() # configure SRv6 localSID End without PSP behavior localsid = VppSRv6LocalSID( self, localsid={'addr': 'A3::0'}, behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_END, nh_addr4='0.0.0.0', nh_addr6='::', end_psp=0, sw_if_index=0, vlan_index=0, fib_table=0) localsid.add_vpp_config() # log the localsids self.logger.debug(self.vapi.cli("show sr localsid")) # create IPv6 packets with SRH (SL=2, SL=1, SL=0) # send one packet per SL value per packet size # SL=0 packet with localSID End with USP needs 2nd SRH count = len(self.pg_packet_sizes) dst_inner = 'a4::1234' pkts = [] # packets with segments-left 2, active segment a3:: packet_header = self.create_packet_header_IPv6_SRH_IPv6( dst_inner, sidlist=['a5::', 'a4::', 'a3::'], segleft=2) # create traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header, self.pg_packet_sizes, count)) # packets with segments-left 1, active segment a3:: packet_header = self.create_packet_header_IPv6_SRH_IPv6( dst_inner, sidlist=['a4::', 'a3::', 'a2::'], segleft=1) # add to traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header, self.pg_packet_sizes, count)) # TODO: test behavior with SL=0 packet (needs 2*SRH?) # send packets and verify received packets self.send_and_verify_pkts(self.pg0, pkts, self.pg1, self.compare_rx_tx_packet_End) # log the localsid counters self.logger.info(self.vapi.cli("show sr localsid")) # remove SRv6 localSIDs localsid.remove_vpp_config() # remove FIB entries # done by tearDown # cleanup interfaces self.teardown_interfaces() def test_SRv6_End_with_PSP(self): """ Test SRv6 End with PSP behavior. """ # send traffic to one destination interface # source and destination interfaces are IPv6 only self.setup_interfaces(ipv6=[True, True]) # configure FIB entries route = VppIpRoute(self, "a4::", 64, [VppRoutePath(self.pg1.remote_ip6, self.pg1.sw_if_index)]) route.add_vpp_config() # configure SRv6 localSID End with PSP behavior localsid = VppSRv6LocalSID( self, localsid={'addr': 'A3::0'}, behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_END, nh_addr4='0.0.0.0', nh_addr6='::', end_psp=1, sw_if_index=0, vlan_index=0, fib_table=0) localsid.add_vpp_config() # log the localsids self.logger.debug(self.vapi.cli("show sr localsid")) # create IPv6 packets with SRH (SL=2, SL=1) # send one packet per SL value per packet size # SL=0 packet with localSID End with PSP is dropped count = len(self.pg_packet_sizes) dst_inner = 'a4::1234' pkts = [] # packets with segments-left 2, active segment a3:: packet_header = self.create_packet_header_IPv6_SRH_IPv6( dst_inner, sidlist=['a5::', 'a4::', 'a3::'], segleft=2) # create traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header, self.pg_packet_sizes, count)) # packets with segments-left 1, active segment a3:: packet_header = self.create_packet_header_IPv6_SRH_IPv6( dst_inner, sidlist=['a4::', 'a3::', 'a2::'], segleft=1) # add to traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header, self.pg_packet_sizes, count)) # send packets and verify received packets self.send_and_verify_pkts(self.pg0, pkts, self.pg1, self.compare_rx_tx_packet_End_PSP) # log the localsid counters self.logger.info(self.vapi.cli("show sr localsid")) # remove SRv6 localSIDs localsid.remove_vpp_config() # remove FIB entries # done by tearDown # cleanup interfaces self.teardown_interfaces() def test_SRv6_End_X(self): """ Test SRv6 End.X (without PSP) behavior. """ # create three interfaces (1 source, 2 destinations) # source and destination interfaces are IPv6 only self.setup_interfaces(ipv6=[True, True, True]) # configure FIB entries # a4::/64 via pg1 and pg2 route = VppIpRoute(self, "a4::", 64, [VppRoutePath(self.pg1.remote_ip6, self.pg1.sw_if_index), VppRoutePath(self.pg2.remote_ip6, self.pg2.sw_if_index)]) route.add_vpp_config() self.logger.debug(self.vapi.cli("show ip6 fib")) # configure SRv6 localSID End.X without PSP behavior # End.X points to interface pg1 localsid = VppSRv6LocalSID( self, localsid={'addr': 'A3::C4'}, behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_X, nh_addr4='0.0.0.0', nh_addr6=self.pg1.remote_ip6, end_psp=0, sw_if_index=self.pg1.sw_if_index, vlan_index=0, fib_table=0) localsid.add_vpp_config() # log the localsids self.logger.debug(self.vapi.cli("show sr localsid")) # create IPv6 packets with SRH (SL=2, SL=1) # send one packet per SL value per packet size # SL=0 packet with localSID End with PSP is dropped count = len(self.pg_packet_sizes) dst_inner = 'a4::1234' pkts = [] # packets with segments-left 2, active segment a3::c4 packet_header = self.create_packet_header_IPv6_SRH_IPv6( dst_inner, sidlist=['a5::', 'a4::', 'a3::c4'], segleft=2) # create traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header, self.pg_packet_sizes, count)) # packets with segments-left 1, active segment a3::c4 packet_header = self.create_packet_header_IPv6_SRH_IPv6( dst_inner, sidlist=['a4::', 'a3::c4', 'a2::'], segleft=1) # add to traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header, self.pg_packet_sizes, count)) # send packets and verify received packets # using same comparison function as End (no PSP) self.send_and_verify_pkts(self.pg0, pkts, self.pg1, self.compare_rx_tx_packet_End) # assert nothing was received on the other interface (pg2) self.pg2.assert_nothing_captured("mis-directed packet(s)") # log the localsid counters self.logger.info(self.vapi.cli("show sr localsid")) # remove SRv6 localSIDs localsid.remove_vpp_config() # remove FIB entries # done by tearDown # cleanup interfaces self.teardown_interfaces() def test_SRv6_End_X_with_PSP(self): """ Test SRv6 End.X with PSP behavior. """ # create three interfaces (1 source, 2 destinations) # source and destination interfaces are IPv6 only self.setup_interfaces(ipv6=[True, True, True]) # configure FIB entries # a4::/64 via pg1 and pg2 route = VppIpRoute(self, "a4::", 64, [VppRoutePath( self.pg1.remote_ip6, self.pg1.sw_if_index), VppRoutePath(self.pg2.remote_ip6, self.pg2.sw_if_index)]) route.add_vpp_config() # configure SRv6 localSID End with PSP behavior localsid = VppSRv6LocalSID( self, localsid={'addr': 'A3::C4'}, behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_X, nh_addr4='0.0.0.0', nh_addr6=self.pg1.remote_ip6, end_psp=1, sw_if_index=self.pg1.sw_if_index, vlan_index=0, fib_table=0) localsid.add_vpp_config() # log the localsids self.logger.debug(self.vapi.cli("show sr localsid")) # create IPv6 packets with SRH (SL=2, SL=1) # send one packet per SL value per packet size # SL=0 packet with localSID End with PSP is dropped count = len(self.pg_packet_sizes) dst_inner = 'a4::1234' pkts = [] # packets with segments-left 2, active segment a3:: packet_header = self.create_packet_header_IPv6_SRH_IPv6( dst_inner, sidlist=['a5::', 'a4::', 'a3::c4'], segleft=2) # create traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header, self.pg_packet_sizes, count)) # packets with segments-left 1, active segment a3:: packet_header = self.create_packet_header_IPv6_SRH_IPv6( dst_inner, sidlist=['a4::', 'a3::c4', 'a2::'], segleft=1) # add to traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header, self.pg_packet_sizes, count)) # send packets and verify received packets # using same comparison function as End with PSP self.send_and_verify_pkts(self.pg0, pkts, self.pg1, self.compare_rx_tx_packet_End_PSP) # assert nothing was received on the other interface (pg2) self.pg2.assert_nothing_captured("mis-directed packet(s)") # log the localsid counters self.logger.info(self.vapi.cli("show sr localsid")) # remove SRv6 localSIDs localsid.remove_vpp_config() # remove FIB entries # done by tearDown # cleanup interfaces self.teardown_interfaces() def test_SRv6_End_DX6(self): """ Test SRv6 End.DX6 behavior. """ # send traffic to one destination interface # source and destination interfaces are IPv6 only self.setup_interfaces(ipv6=[True, True]) # configure SRv6 localSID End.DX6 behavior localsid = VppSRv6LocalSID( self, localsid={'addr': 'A3::C4'}, behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_DX6, nh_addr4='0.0.0.0', nh_addr6=self.pg1.remote_ip6, end_psp=0, sw_if_index=self.pg1.sw_if_index, vlan_index=0, fib_table=0) localsid.add_vpp_config() # log the localsids self.logger.debug(self.vapi.cli("show sr localsid")) # create IPv6 packets with SRH (SL=0) # send one packet per packet size count = len(self.pg_packet_sizes) dst_inner = 'a4::1234' # inner header destination address pkts = [] # packets with SRH, segments-left 0, active segment a3::c4 packet_header = self.create_packet_header_IPv6_SRH_IPv6( dst_inner, sidlist=['a3::c4', 'a2::', 'a1::'], segleft=0) # add to traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header, self.pg_packet_sizes, count)) # packets without SRH, IPv6 in IPv6 # outer IPv6 dest addr is the localsid End.DX6 packet_header = self.create_packet_header_IPv6_IPv6( dst_inner, dst_outer='a3::c4') # add to traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header, self.pg_packet_sizes, count)) # send packets and verify received packets self.send_and_verify_pkts(self.pg0, pkts, self.pg1, self.compare_rx_tx_packet_End_DX6) # log the localsid counters self.logger.info(self.vapi.cli("show sr localsid")) # remove SRv6 localSIDs localsid.remove_vpp_config() # cleanup interfaces self.teardown_interfaces() def test_SRv6_End_DT6(self): """ Test SRv6 End.DT6 behavior. """ # create three interfaces (1 source, 2 destinations) # all interfaces are IPv6 only # source interface in global FIB (0) # destination interfaces in global and vrf vrf_1 = 1 ipt = VppIpTable(self, vrf_1, is_ip6=True) ipt.add_vpp_config() self.setup_interfaces(ipv6=[True, True, True], ipv6_table_id=[0, 0, vrf_1]) # configure FIB entries # a4::/64 is reachable # via pg1 in table 0 (global) # and via pg2 in table vrf_1 route0 = VppIpRoute(self, "a4::", 64, [VppRoutePath(self.pg1.remote_ip6, self.pg1.sw_if_index, nh_table_id=0)], table_id=0) route0.add_vpp_config() route1 = VppIpRoute(self, "a4::", 64, [VppRoutePath(self.pg2.remote_ip6, self.pg2.sw_if_index, nh_table_id=vrf_1)], table_id=vrf_1) route1.add_vpp_config() self.logger.debug(self.vapi.cli("show ip6 fib")) # configure SRv6 localSID End.DT6 behavior # Note: # fib_table: where the localsid is installed # sw_if_index: in T-variants of localsid this is the vrf table_id localsid = VppSRv6LocalSID( self, localsid={'addr': 'A3::C4'}, behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_DT6, nh_addr4='0.0.0.0', nh_addr6='::', end_psp=0, sw_if_index=vrf_1, vlan_index=0, fib_table=0) localsid.add_vpp_config() # log the localsids self.logger.debug(self.vapi.cli("show sr localsid")) # create IPv6 packets with SRH (SL=0) # send one packet per packet size count = len(self.pg_packet_sizes) dst_inner = 'a4::1234' # inner header destination address pkts = [] # packets with SRH, segments-left 0, active segment a3::c4 packet_header = self.create_packet_header_IPv6_SRH_IPv6( dst_inner, sidlist=['a3::c4', 'a2::', 'a1::'], segleft=0) # add to traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg2, packet_header, self.pg_packet_sizes, count)) # packets without SRH, IPv6 in IPv6 # outer IPv6 dest addr is the localsid End.DT6 packet_header = self.create_packet_header_IPv6_IPv6( dst_inner, dst_outer='a3::c4') # add to traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg2, packet_header, self.pg_packet_sizes, count)) # send packets and verify received packets # using same comparison function as End.DX6 self.send_and_verify_pkts(self.pg0, pkts, self.pg2, self.compare_rx_tx_packet_End_DX6) # assert nothing was received on the other interface (pg2) self.pg1.assert_nothing_captured("mis-directed packet(s)") # log the localsid counters self.logger.info(self.vapi.cli("show sr localsid")) # remove SRv6 localSIDs localsid.remove_vpp_config() # remove FIB entries # done by tearDown # cleanup interfaces self.teardown_interfaces() def test_SRv6_End_DX4(self): """ Test SRv6 End.DX4 behavior. """ # send traffic to one destination interface # source interface is IPv6 only # destination interface is IPv4 only self.setup_interfaces(ipv6=[True, False], ipv4=[False, True]) # configure SRv6 localSID End.DX4 behavior localsid = VppSRv6LocalSID( self, localsid={'addr': 'A3::C4'}, behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_DX4, nh_addr4=self.pg1.remote_ip4, nh_addr6='::', end_psp=0, sw_if_index=self.pg1.sw_if_index, vlan_index=0, fib_table=0) localsid.add_vpp_config() # log the localsids self.logger.debug(self.vapi.cli("show sr localsid")) # send one packet per packet size count = len(self.pg_packet_sizes) dst_inner = '4.1.1.123' # inner header destination address pkts = [] # packets with SRH, segments-left 0, active segment a3::c4 packet_header = self.create_packet_header_IPv6_SRH_IPv4( dst_inner, sidlist=['a3::c4', 'a2::', 'a1::'], segleft=0) # add to traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header, self.pg_packet_sizes, count)) # packets without SRH, IPv4 in IPv6 # outer IPv6 dest addr is the localsid End.DX4 packet_header = self.create_packet_header_IPv6_IPv4( dst_inner, dst_outer='a3::c4') # add to traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header, self.pg_packet_sizes, count)) # send packets and verify received packets self.send_and_verify_pkts(self.pg0, pkts, self.pg1, self.compare_rx_tx_packet_End_DX4) # log the localsid counters self.logger.info(self.vapi.cli("show sr localsid")) # remove SRv6 localSIDs localsid.remove_vpp_config() # cleanup interfaces self.teardown_interfaces() def test_SRv6_End_DT4(self): """ Test SRv6 End.DT4 behavior. """ # create three interfaces (1 source, 2 destinations) # source interface is IPv6-only # destination interfaces are IPv4 only # source interface in global FIB (0) # destination interfaces in global and vrf vrf_1 = 1 ipt = VppIpTable(self, vrf_1) ipt.add_vpp_config() self.setup_interfaces(ipv6=[True, False, False], ipv4=[False, True, True], ipv6_table_id=[0, 0, 0], ipv4_table_id=[0, 0, vrf_1]) # configure FIB entries # 4.1.1.0/24 is reachable # via pg1 in table 0 (global) # and via pg2 in table vrf_1 route0 = VppIpRoute(self, "4.1.1.0", 24, [VppRoutePath(self.pg1.remote_ip4, self.pg1.sw_if_index, nh_table_id=0)], table_id=0) route0.add_vpp_config() route1 = VppIpRoute(self, "4.1.1.0", 24, [VppRoutePath(self.pg2.remote_ip4, self.pg2.sw_if_index, nh_table_id=vrf_1)], table_id=vrf_1) route1.add_vpp_config() self.logger.debug(self.vapi.cli("show ip fib")) # configure SRv6 localSID End.DT6 behavior # Note: # fib_table: where the localsid is installed # sw_if_index: in T-variants of localsid: vrf table_id localsid = VppSRv6LocalSID( self, localsid={'addr': 'A3::C4'}, behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_DT4, nh_addr4='0.0.0.0', nh_addr6='::', end_psp=0, sw_if_index=vrf_1, vlan_index=0, fib_table=0) localsid.add_vpp_config() # log the localsids self.logger.debug(self.vapi.cli("show sr localsid")) # create IPv6 packets with SRH (SL=0) # send one packet per packet size count = len(self.pg_packet_sizes) dst_inner = '4.1.1.123' # inner header destination address pkts = [] # packets with SRH, segments-left 0, active segment a3::c4 packet_header = self.create_packet_header_IPv6_SRH_IPv4( dst_inner, sidlist=['a3::c4', 'a2::', 'a1::'], segleft=0) # add to traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg2, packet_header, self.pg_packet_sizes, count)) # packets without SRH, IPv6 in IPv6 # outer IPv6 dest addr is the localsid End.DX4 packet_header = self.create_packet_header_IPv6_IPv4( dst_inner, dst_outer='a3::c4') # add to traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg2, packet_header, self.pg_packet_sizes, count)) # send packets and verify received packets # using same comparison function as End.DX4 self.send_and_verify_pkts(self.pg0, pkts, self.pg2, self.compare_rx_tx_packet_End_DX4) # assert nothing was received on the other interface (pg2) self.pg1.assert_nothing_captured("mis-directed packet(s)") # log the localsid counters self.logger.info(self.vapi.cli("show sr localsid")) # remove SRv6 localSIDs localsid.remove_vpp_config() # remove FIB entries # done by tearDown # cleanup interfaces self.teardown_interfaces() def test_SRv6_End_DX2(self): """ Test SRv6 End.DX2 behavior. """ # send traffic to one destination interface # source interface is IPv6 only self.setup_interfaces(ipv6=[True, False], ipv4=[False, False]) # configure SRv6 localSID End.DX2 behavior localsid = VppSRv6LocalSID( self, localsid={'addr': 'A3::C4'}, behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_DX2, nh_addr4='0.0.0.0', nh_addr6='::', end_psp=0, sw_if_index=self.pg1.sw_if_index, vlan_index=0, fib_table=0) localsid.add_vpp_config() # log the localsids self.logger.debug(self.vapi.cli("show sr localsid")) # send one packet per packet size count = len(self.pg_packet_sizes) pkts = [] # packets with SRH, segments-left 0, active segment a3::c4 # L2 has no dot1q header packet_header = self.create_packet_header_IPv6_SRH_L2( sidlist=['a3::c4', 'a2::', 'a1::'], segleft=0, vlan=0) # add to traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header, self.pg_packet_sizes, count)) # packets with SRH, segments-left 0, active segment a3::c4 # L2 has dot1q header packet_header = self.create_packet_header_IPv6_SRH_L2( sidlist=['a3::c4', 'a2::', 'a1::'], segleft=0, vlan=123) # add to traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header, self.pg_packet_sizes, count)) # packets without SRH, L2 in IPv6 # outer IPv6 dest addr is the localsid End.DX2 # L2 has no dot1q header packet_header = self.create_packet_header_IPv6_L2( dst_outer='a3::c4', vlan=0) # add to traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header, self.pg_packet_sizes, count)) # packets without SRH, L2 in IPv6 # outer IPv6 dest addr is the localsid End.DX2 # L2 has dot1q header packet_header = self.create_packet_header_IPv6_L2( dst_outer='a3::c4', vlan=123) # add to traffic stream pg0->pg1 pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header, self.pg_packet_sizes, count)) # send packets and verify received packets self.send_and_verify_pkts(self.pg0, pkts, self.pg1, self.compare_rx_tx_packet_End_DX2) # log the localsid counters self.logger.info(self.vapi.cli("show sr localsid")) # remove SRv6 localSIDs localsid.remove_vpp_config() # cleanup interfaces self.teardown_interfaces() @unittest.skipUnless(0, "PC to fix") def test_SRv6_T_Insert_Classifier(self): """ Test SRv6 Transit.Insert behavior (IPv6 only). steer packets using the classifier """ # send traffic to one destination interface # source and destination are IPv6 only self.setup_interfaces(ipv6=[False, False, False, True, True]) # configure FIB entries route = VppIpRoute(self, "a4::", 64, [VppRoutePath( self.pg4.remote_ip6, self.pg4.sw_if_index)]) route.add_vpp_config() # configure encaps IPv6 source address # needs to be done before SR Policy config # TODO: API? self.vapi.cli("set sr encaps source addr a3::") bsid = 'a3::9999:1' # configure SRv6 Policy # Note: segment list order: first -> last sr_policy = VppSRv6Policy( self, bsid=bsid, is_encap=0, sr_type=SRv6PolicyType.SR_POLICY_TYPE_DEFAULT, weight=1, fib_table=0, segments=['a4::', 'a5::', 'a6::c7'], source='a3::') sr_policy.add_vpp_config() self.sr_policy = sr_policy # log the sr policies self.logger.info(self.vapi.cli("show sr policies")) # add classify table # mask on dst ip address prefix a7::/8 mask = '{!s:0<16}'.format('ff') r = self.vapi.classify_add_del_table( 1, binascii.unhexlify(mask), match_n_vectors=(len(mask) - 1) // 32 + 1, current_data_flag=1, skip_n_vectors=2) # data offset self.assertIsNotNone(r, 'No response msg for add_del_table') table_index = r.new_table_index # add the source routing node as a ip6 inacl netxt node r = self.vapi.add_node_next('ip6-inacl', 'sr-pl-rewrite-insert') inacl_next_node_index = r.node_index match = '{!s:0<16}'.format('a7') r = self.vapi.classify_add_del_session( 1, table_index, binascii.unhexlify(match), hit_next_index=inacl_next_node_index, action=3, metadata=0) # sr policy index self.assertIsNotNone(r, 'No response msg for add_del_session') # log the classify table used in the steering policy self.logger.info(self.vapi.cli("show classify table")) r = self.vapi.input_acl_set_interface( is_add=1, sw_if_index=self.pg3.sw_if_index, ip6_table_index=table_index) self.assertIsNotNone(r, 'No response msg for input_acl_set_interface') # log the ip6 inacl self.logger.info(self.vapi.cli("show inacl type ip6")) # create packets count = len(self.pg_packet_sizes) dst_inner = 'a7::1234' pkts = [] # create IPv6 packets without SRH packet_header = self.create_packet_header_IPv6(dst_inner) # create traffic stream pg3->pg4 pkts.extend(self.create_stream(self.pg3, self.pg4, packet_header, self.pg_packet_sizes, count)) # create IPv6 packets with SRH # packets with segments-left 1, active segment a7:: packet_header = self.create_packet_header_IPv6_SRH( sidlist=['a8::', 'a7::', 'a6::'], segleft=1) # create traffic stream pg3->pg4 pkts.extend(self.create_stream(self.pg3, self.pg4, packet_header, self.pg_packet_sizes, count)) # send packets and verify received packets self.send_and_verify_pkts(self.pg3, pkts, self.pg4, self.compare_rx_tx_packet_T_Insert) # remove the interface l2 input feature r = self.vapi.input_acl_set_interface( is_add=0, sw_if_index=self.pg3.sw_if_index, ip6_table_index=table_index) self.assertIsNotNone(r, 'No response msg for input_acl_set_interface') # log the ip6 inacl after cleaning self.logger.info(self.vapi.cli("show inacl type ip6")) # log the localsid counters self.logger.info(self.vapi.cli("show sr localsid")) # remove classifier SR steering # classifier_steering.remove_vpp_config() self.logger.info(self.vapi.cli("show sr steering policies")) # remove SR Policies self.sr_policy.remove_vpp_config() self.logger.info(self.vapi.cli("show sr policies")) # remove classify session and table r = self.vapi.classify_add_del_session( 0, table_index, binascii.unhexlify(match)) self.assertIsNotNone(r, 'No response msg for add_del_session') r = self.vapi.classify_add_del_table( 0, binascii.unhexlify(mask), table_index=table_index) self.assertIsNotNone(r, 'No response msg for add_del_table') self.logger.info(self.vapi.cli("show classify table")) # remove FIB entries # done by tearDown # cleanup interfaces self.teardown_interfaces() def compare_rx_tx_packet_T_Encaps(self, tx_pkt, rx_pkt): """ Compare input and output packet after passing T.Encaps :param tx_pkt: transmitted packet :param rx_pkt: received packet """ # T.Encaps updates the headers as follows: # SR Policy seglist (S3, S2, S1) # SR Policy source C # IPv6: # in: IPv6(A, B2) # out: IPv6(C, S1)SRH(S3, S2, S1; SL=2)IPv6(A, B2) # IPv6 + SRH: # in: IPv6(A, B2)SRH(B3, B2, B1; SL=1) # out: IPv6(C, S1)SRH(S3, S2, S1; SL=2)IPv6(a, B2)SRH(B3, B2, B1; SL=1) # get first (outer) IPv6 header of rx'ed packet rx_ip = rx_pkt.getlayer(IPv6) rx_srh = None tx_ip = tx_pkt.getlayer(IPv6) # expected segment-list seglist = self.sr_policy.segments # reverse list to get order as in SRH tx_seglist = seglist[::-1] # get source address of SR Policy sr_policy_source = self.sr_policy.source # rx'ed packet should have SRH self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting)) # get SRH rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting) # received ip.src should be equal to SR Policy source self.assertEqual(rx_ip.src, sr_policy_source) # received ip.dst should be equal to expected sidlist[lastentry] self.assertEqual(rx_ip.dst, tx_seglist[-1]) # rx'ed seglist should be equal to expected seglist self.assertEqual(rx_srh.addresses, tx_seglist) # segleft should be equal to size expected seglist-1 self.assertEqual(rx_srh.segleft, len(tx_seglist)-1) # segleft should be equal to lastentry self.assertEqual(rx_srh.segleft, rx_srh.lastentry) # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt # except for the hop-limit field # -> update tx'ed hlim to the expected hlim tx_ip.hlim = tx_ip.hlim - 1 self.assertEqual(rx_srh.payload, tx_ip) self.logger.debug("packet verification: SUCCESS") def compare_rx_tx_packet_T_Encaps_IPv4(self, tx_pkt, rx_pkt): """ Compare input and output packet after passing T.Encaps for IPv4 :param tx_pkt: transmitted packet :param rx_pkt: received packet """ # T.Encaps for IPv4 updates the headers as follows: # SR Policy seglist (S3, S2, S1) # SR Policy source C # IPv4: # in: IPv4(A, B2) # out: IPv6(C, S1)SRH(S3, S2, S1; SL=2)IPv4(A, B2) # get first (outer) IPv6 header of rx'ed packet rx_ip = rx_pkt.getlayer(IPv6) rx_srh = None tx_ip = tx_pkt.getlayer(IP) # expected segment-list seglist = self.sr_policy.segments # reverse list to get order as in SRH tx_seglist = seglist[::-1] # get source address of SR Policy sr_policy_source = self.sr_policy.source # checks common to cases tx with and without SRH # rx'ed packet should have SRH and IPv4 header self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting)) self.assertTrue(rx_ip.payload.haslayer(IP)) # get SRH rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting) # received ip.src should be equal to SR Policy source self.assertEqual(rx_ip.src, sr_policy_source) # received ip.dst should be equal to sidlist[lastentry] self.assertEqual(rx_ip.dst, tx_seglist[-1]) # rx'ed seglist should be equal to seglist self.assertEqual(rx_srh.addresses, tx_seglist) # segleft should be equal to size seglist-1 self.assertEqual(rx_srh.segleft, len(tx_seglist)-1) # segleft should be equal to lastentry self.assertEqual(rx_srh.segleft, rx_srh.lastentry) # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt # except for the ttl field and ip checksum # -> adjust tx'ed ttl to expected ttl tx_ip.ttl = tx_ip.ttl - 1 # -> set tx'ed ip checksum to None and let scapy recompute tx_ip.chksum = None # read back the pkt (with str()) to force computing these fields # probably other ways to accomplish this are possible tx_ip = IP(scapy.compat.raw(tx_ip)) self.assertEqual(rx_srh.payload, tx_ip) self.logger.debug("packet verification: SUCCESS") def compare_rx_tx_packet_T_Encaps_L2(self, tx_pkt, rx_pkt): """ Compare input and output packet after passing T.Encaps for L2 :param tx_pkt: transmitted packet :param rx_pkt: received packet """ # T.Encaps for L2 updates the headers as follows: # SR Policy seglist (S3, S2, S1) # SR Policy source C # L2: # in: L2 # out: IPv6(C, S1)SRH(S3, S2, S1; SL=2)L2 # get first (outer) IPv6 header of rx'ed packet rx_ip = rx_pkt.getlayer(IPv6) rx_srh = None tx_ether = tx_pkt.getlayer(Ether) # expected segment-list seglist = self.sr_policy.segments # reverse list to get order as in SRH tx_seglist = seglist[::-1] # get source address of SR Policy sr_policy_source = self.sr_policy.source # rx'ed packet should have SRH self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting)) # get SRH rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting) # received ip.src should be equal to SR Policy source self.assertEqual(rx_ip.src, sr_policy_source) # received ip.dst should be equal to sidlist[lastentry] self.assertEqual(rx_ip.dst, tx_seglist[-1]) # rx'ed seglist should be equal to seglist self.assertEqual(rx_srh.addresses, tx_seglist) # segleft should be equal to size seglist-1 self.assertEqual(rx_srh.segleft, len(tx_seglist)-1) # segleft should be equal to lastentry self.assertEqual(rx_srh.segleft, rx_srh.lastentry) # nh should be "No Next Header" (59) self.assertEqual(rx_srh.nh, 59) # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt self.assertEqual(Ether(scapy.compat.raw(rx_srh.payload)), tx_ether) self.logger.debug("packet verification: SUCCESS") def compare_rx_tx_packet_T_Insert(self, tx_pkt, rx_pkt): """ Compare input and output packet after passing T.Insert :param tx_pkt: transmitted packet :param rx_pkt: received packet """ # T.Insert updates the headers as follows: # IPv6: # in: IPv6(A, B2) # out: IPv6(A, S1)SRH(B2, S3, S2, S1; SL=3) # IPv6 + SRH: # in: IPv6(A, B2)SRH(B3, B2, B1; SL=1) # out: IPv6(A, S1)SRH(B2, S3, S2, S1; SL=3)SRH(B3, B2, B1; SL=1) # get first (outer) IPv6 header of rx'ed packet rx_ip = rx_pkt.getlayer(IPv6) rx_srh = None rx_ip2 = None rx_srh2 = None rx_ip3 = None rx_udp = rx_pkt[UDP] tx_ip = tx_pkt.getlayer(IPv6) tx_srh = None tx_ip2 = None # some packets have been tx'ed with an SRH, some without it # get SRH if tx'ed packet has it if tx_pkt.haslayer(IPv6ExtHdrSegmentRouting): tx_srh = tx_pkt.getlayer(IPv6ExtHdrSegmentRouting) tx_ip2 = tx_pkt.getlayer(IPv6, 2) tx_udp = tx_pkt[UDP] # expected segment-list (make copy of SR Policy segment list) seglist = self.sr_policy.segments[:] # expected seglist has initial dest addr as last segment seglist.append(tx_ip.dst) # reverse list to get order as in SRH tx_seglist = seglist[::-1] # get source address of SR Policy sr_policy_source = self.sr_policy.source # checks common to cases tx with and without SRH # rx'ed packet should have SRH and only one IPv6 header self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting)) self.assertFalse(rx_ip.payload.haslayer(IPv6)) # get SRH rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting) # rx'ed ip.src should be equal to tx'ed ip.src self.assertEqual(rx_ip.src, tx_ip.src) # rx'ed ip.dst should be equal to sidlist[lastentry] self.assertEqual(rx_ip.dst, tx_seglist[-1]) # rx'ed seglist should be equal to expected seglist self.assertEqual(rx_srh.addresses, tx_seglist) # segleft should be equal to size(expected seglist)-1 self.assertEqual(rx_srh.segleft, len(tx_seglist)-1) # segleft should be equal to lastentry self.assertEqual(rx_srh.segleft, rx_srh.lastentry) if tx_srh: # packet was tx'ed with SRH # packet should have 2nd SRH self.assertTrue(rx_srh.payload.haslayer(IPv6ExtHdrSegmentRouting)) # get 2nd SRH rx_srh2 = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting, 2) # rx'ed srh2.addresses should be equal to tx'ed srh.addresses self.assertEqual(rx_srh2.addresses, tx_srh.addresses) # rx'ed srh2.segleft should be equal to tx'ed srh.segleft self.assertEqual(rx_srh2.segleft, tx_srh.segleft) # rx'ed srh2.lastentry should be equal to tx'ed srh.lastentry self.assertEqual(rx_srh2.lastentry, tx_srh.lastentry) else: # packet was tx'ed without SRH # rx packet should have no other SRH self.assertFalse(rx_srh.payload.haslayer(IPv6ExtHdrSegmentRouting)) # UDP layer should be unchanged self.assertEqual(rx_udp, tx_udp) self.logger.debug("packet verification: SUCCESS") def compare_rx_tx_packet_End(self, tx_pkt, rx_pkt): """ Compare input and output packet after passing End (without PSP) :param tx_pkt: transmitted packet :param rx_pkt: received packet """ # End (no PSP) updates the headers as follows: # IPv6 + SRH: # in: IPv6(A, S1)SRH(S3, S2, S1; SL=2) # out: IPv6(A, S2)SRH(S3, S2, S1; SL=1) # get first (outer) IPv6 header of rx'ed packet rx_ip = rx_pkt.getlayer(IPv6) rx_srh = None rx_ip2 = None rx_udp = rx_pkt[UDP] tx_ip = tx_pkt.getlayer(IPv6) # we know the packet has been tx'ed # with an inner IPv6 header and an SRH tx_ip2 = tx_pkt.getlayer(IPv6, 2) tx_srh = tx_pkt.getlayer(IPv6ExtHdrSegmentRouting) tx_udp = tx_pkt[UDP] # common checks, regardless of tx segleft value # rx'ed packet should have 2nd IPv6 header self.assertTrue(rx_ip.payload.haslayer(IPv6)) # get second (inner) IPv6 header rx_ip2 = rx_pkt.getlayer(IPv6, 2) if tx_ip.segleft > 0: # SRH should NOT have been popped: # End SID without PSP does not pop SRH if segleft>0 self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting)) rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting) # received ip.src should be equal to expected ip.src self.assertEqual(rx_ip.src, tx_ip.src) # sidlist should be unchanged self.assertEqual(rx_srh.addresses, tx_srh.addresses) # segleft should have been decremented self.assertEqual(rx_srh.segleft, tx_srh.segleft-1) # received ip.dst should be equal to sidlist[segleft] self.assertEqual(rx_ip.dst, rx_srh.addresses[rx_srh.segleft]) # lastentry should be unchanged self.assertEqual(rx_srh.lastentry, tx_srh.lastentry) # inner IPv6 packet (ip2) should be unchanged self.assertEqual(rx_ip2.src, tx_ip2.src) self.assertEqual(rx_ip2.dst, tx_ip2.dst) # else: # tx_ip.segleft == 0 # TODO: Does this work with 2 SRHs in ingress packet? # UDP layer should be unchanged self.assertEqual(rx_udp, tx_udp) self.logger.debug("packet verification: SUCCESS") def compare_rx_tx_packet_End_PSP(self, tx_pkt, rx_pkt): """ Compare input and output packet after passing End with PSP :param tx_pkt: transmitted packet :param rx_pkt: received packet """ # End (PSP) updates the headers as follows: # IPv6 + SRH (SL>1): # in: IPv6(A, S1)SRH(S3, S2, S1; SL=2) # out: IPv6(A, S2)SRH(S3, S2, S1; SL=1) # IPv6 + SRH (SL=1): # in: IPv6(A, S2)SRH(S3, S2, S1; SL=1) # out: IPv6(A, S3) # get first (outer) IPv6 header of rx'ed packet rx_ip = rx_pkt.getlayer(IPv6) rx_srh = None rx_ip2 = None rx_udp = rx_pkt[UDP] tx_ip = tx_pkt.getlayer(IPv6) # we know the packet has been tx'ed # with an inner IPv6 header and an SRH tx_ip2 = tx_pkt.getlayer(IPv6, 2) tx_srh = tx_pkt.getlayer(IPv6ExtHdrSegmentRouting) tx_udp = tx_pkt[UDP] # common checks, regardless of tx segleft value self.assertTrue(rx_ip.payload.haslayer(IPv6)) rx_ip2 = rx_pkt.getlayer(IPv6, 2) # inner IPv6 packet (ip2) should be unchanged self.assertEqual(rx_ip2.src, tx_ip2.src) self.assertEqual(rx_ip2.dst, tx_ip2.dst) if tx_ip.segleft > 1: # SRH should NOT have been popped: # End SID with PSP does not pop SRH if segleft>1 # rx'ed packet should have SRH self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting)) rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting) # received ip.src should be equal to expected ip.src self.assertEqual(rx_ip.src, tx_ip.src) # sidlist should be unchanged self.assertEqual(rx_srh.addresses, tx_srh.addresses) # segleft should have been decremented self.assertEqual(rx_srh.segleft, tx_srh.segleft-1) # received ip.dst should be equal to sidlist[segleft] self.assertEqual(rx_ip.dst, rx_srh.addresses[rx_srh.segleft]) # lastentry should be unchanged self.assertEqual(rx_srh.lastentry, tx_srh.lastentry) else: # tx_ip.segleft <= 1 # SRH should have been popped: # End SID with PSP and segleft=1 pops SRH # the two IPv6 headers are still present # outer IPv6 header has DA == last segment of popped SRH # SRH should not be present self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting)) # outer IPv6 header ip.src should be equal to tx'ed ip.src self.assertEqual(rx_ip.src, tx_ip.src) # outer IPv6 header ip.dst should be = to tx'ed sidlist[segleft-1] self.assertEqual(rx_ip.dst, tx_srh.addresses[tx_srh.segleft-1]) # UDP layer should be unchanged self.assertEqual(rx_udp, tx_udp) self.logger.debug("packet verification: SUCCESS") def compare_rx_tx_packet_End_DX6(self, tx_pkt, rx_pkt): """ Compare input and output packet after passing End.DX6 :param tx_pkt: transmitted packet :param rx_pkt: received packet """ # End.DX6 updates the headers as follows: # IPv6 + SRH (SL=0): # in: IPv6(A, S3)SRH(S3, S2, S1; SL=0)IPv6(B, D) # out: IPv6(B, D) # IPv6: # in: IPv6(A, S3)IPv6(B, D) # out: IPv6(B, D) # get first (outer) IPv6 header of rx'ed packet rx_ip = rx_pkt.getlayer(IPv6) tx_ip = tx_pkt.getlayer(IPv6) tx_ip2 = tx_pkt.getlayer(IPv6, 2) # verify if rx'ed packet has no SRH self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting)) # the whole rx_ip pkt should be equal to tx_ip2 # except for the hlim field # -> adjust tx'ed hlim to expected hlim tx_ip2.hlim = tx_ip2.hlim - 1 self.assertEqual(rx_ip, tx_ip2) self.logger.debug("packet verification: SUCCESS") def compare_rx_tx_packet_End_DX4(self, tx_pkt, rx_pkt): """ Compare input and output packet after passing End.DX4 :param tx_pkt: transmitted packet :param rx_pkt: received packet """ # End.DX4 updates the headers as follows: # IPv6 + SRH (SL=0): # in: IPv6(A, S3)SRH(S3, S2, S1; SL=0)IPv4(B, D) # out: IPv4(B, D) # IPv6: # in: IPv6(A, S3)IPv4(B, D) # out: IPv4(B, D) # get IPv4 header of rx'ed packet rx_ip = rx_pkt.getlayer(IP) tx_ip = tx_pkt.getlayer(IPv6) tx_ip2 = tx_pkt.getlayer(IP) # verify if rx'ed packet has no SRH self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting)) # the whole rx_ip pkt should be equal to tx_ip2 # except for the ttl field and ip checksum # -> adjust tx'ed ttl to expected ttl tx_ip2.ttl = tx_ip2.ttl - 1 # -> set tx'ed ip checksum to None and let scapy recompute tx_ip2.chksum = None # read back the pkt (with str()) to force computing these fields # probably other ways to accomplish this are possible tx_ip2 = IP(scapy.compat.raw(tx_ip2)) self.assertEqual(rx_ip, tx_ip2) self.logger.debug("packet verification: SUCCESS") def compare_rx_tx_packet_End_DX2(self, tx_pkt, rx_pkt): """ Compare input and output packet after passing End.DX2 :param tx_pkt: transmitted packet :param rx_pkt: received packet """ # End.DX2 updates the headers as follows: # IPv6 + SRH (SL=0): # in: IPv6(A, S3)SRH(S3, S2, S1; SL=0)L2 # out: L2 # IPv6: # in: IPv6(A, S3)L2 # out: L2 # get IPv4 header of rx'ed packet rx_eth = rx_pkt.getlayer(Ether) tx_ip = tx_pkt.getlayer(IPv6) # we can't just get the 2nd Ether layer # get the Raw content and dissect it as Ether tx_eth1 = Ether(scapy.compat.raw(tx_pkt[Raw])) # verify if rx'ed packet has no SRH self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting)) # the whole rx_eth pkt should be equal to tx_eth1 self.assertEqual(rx_eth, tx_eth1) self.logger.debug("packet verification: SUCCESS") def create_stream(self, src_if, dst_if, packet_header, packet_sizes, count): """Create SRv6 input packet stream for defined interface. :param VppInterface src_if: Interface to create packet stream for :param VppInterface dst_if: destination interface of packet stream :param packet_header: Layer3 scapy packet headers, L2 is added when not provided, Raw(payload) with packet_info is added :param list packet_sizes: packet stream pckt sizes,sequentially applied to packets in stream have :param int count: number of packets in packet stream :return: list of packets """ self.logger.info("Creating packets") pkts = [] for i in range(0, count-1): payload_info = self.create_packet_info(src_if, dst_if) self.logger.debug( "Creating packet with index %d" % (payload_info.index)) payload = self.info_to_payload(payload_info) # add L2 header if not yet provided in packet_header if packet_header.getlayer(0).name == 'Ethernet': p = (packet_header / Raw(payload)) else: p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) / packet_header / Raw(payload)) size = packet_sizes[i % len(packet_sizes)] self.logger.debug("Packet size %d" % (size)) self.extend_packet(p, size) # we need to store the packet with the automatic fields computed # read back the dumped packet (with str()) # to force computing these fields # probably other ways are possible p = Ether(scapy.compat.raw(p)) payload_info.data = p.copy() self.logger.debug(ppp("Created packet:", p)) pkts.append(p) self.logger.info("Done creating packets") return pkts def send_and_verify_pkts(self, input, pkts, output, compare_func): """Send packets and verify received packets using compare_func :param input: ingress interface of DUT :param pkts: list of packets to transmit :param output: egress interface of DUT :param compare_func: function to compare in and out packets """ # add traffic stream to input interface input.add_stream(pkts) # enable capture on all interfaces self.pg_enable_capture(self.pg_interfaces) # start traffic self.logger.info("Starting traffic") self.pg_start() # get output capture self.logger.info("Getting packet capture") capture = output.get_capture() # assert nothing was captured on input interface input.assert_nothing_captured() # verify captured packets self.verify_captured_pkts(output, capture, compare_func) def create_packet_header_IPv6(self, dst): """Create packet header: IPv6 header, UDP header :param dst: IPv6 destination address IPv6 source address is 1234::1 UDP source port and destination port are 1234 """ p = (IPv6(src='1234::1', dst=dst) / UDP(sport=1234, dport=1234)) return p def create_packet_header_IPv6_SRH(self, sidlist, segleft): """Create packet header: IPv6 header with SRH, UDP header :param list sidlist: segment list :param int segleft: segments-left field value IPv6 destination address is set to sidlist[segleft] IPv6 source addresses are 1234::1 and 4321::1 UDP source port and destination port are 1234 """ p = (IPv6(src='1234::1', dst=sidlist[segleft]) / IPv6ExtHdrSegmentRouting(addresses=sidlist) / UDP(sport=1234, dport=1234)) return p def create_packet_header_IPv6_SRH_IPv6(self, dst, sidlist, segleft): """Create packet header: IPv6 encapsulated in SRv6: IPv6 header with SRH, IPv6 header, UDP header :param ipv6address dst: inner IPv6 destination address :param list sidlist: segment list of outer IPv6 SRH :param int segleft: segments-left field of outer IPv6 SRH Outer IPv6 destination address is set to sidlist[segleft] IPv6 source addresses are 1234::1 and 4321::1 UDP source port and destination port are 1234 """ p = (IPv6(src='1234::1', dst=sidlist[segleft]) / IPv6ExtHdrSegmentRouting(addresses=sidlist, segleft=segleft, nh=41) / IPv6(src='4321::1', dst=dst) / UDP(sport=1234, dport=1234)) return p def create_packet_header_IPv6_IPv6(self, dst_inner, dst_outer): """Create packet header: IPv6 encapsulated in IPv6: IPv6 header, IPv6 header, UDP header :param ipv6address dst_inner: inner IPv6 destination address :param ipv6address dst_outer: outer IPv6 destination address IPv6 source addresses are 1234::1 and 4321::1 UDP source port and destination port are 1234 """ p = (IPv6(src='1234::1', dst=dst_outer) / IPv6(src='4321::1', dst=dst_inner) / UDP(sport=1234, dport=1234)) return p def create_packet_header_IPv6_SRH_SRH_IPv6(self, dst, sidlist1, segleft1, sidlist2, segleft2): """Create packet header: IPv6 encapsulated in SRv6 with 2 SRH: IPv6 header with SRH, 2nd SRH, IPv6 header, UDP header :param ipv6address dst: inner IPv6 destination address :param list sidlist1: segment list of outer IPv6 SRH :param int segleft1: segments-left field of outer IPv6 SRH :param list sidlist2: segment list of inner IPv6 SRH :param int segleft2: segments-left field of inner IPv6 SRH Outer IPv6 destination address is set to sidlist[segleft] IPv6 source addresses are 1234::1 and 4321::1 UDP source port and destination port are 1234 """ p = (IPv6(src='1234::1', dst=sidlist1[segleft1]) / IPv6ExtHdrSegmentRouting(addresses=sidlist1, segleft=segleft1, nh=43) / IPv6ExtHdrSegmentRouting(addresses=sidlist2, segleft=segleft2, nh=41) / IPv6(src='4321::1', dst=dst) / UDP(sport=1234, dport=1234)) return p def create_packet_header_IPv4(self, dst): """Create packet header: IPv4 header, UDP header :param dst: IPv4 destination address IPv4 source address is 123.1.1.1 UDP source port and destination port are 1234 """ p = (IP(src='123.1.1.1', dst=dst) / UDP(sport=1234, dport=1234)) return p def create_packet_header_IPv6_IPv4(self, dst_inner, dst_outer): """Create packet header: IPv4 encapsulated in IPv6: IPv6 header, IPv4 header, UDP header :param ipv4address dst_inner: inner IPv4 destination address :param ipv6address dst_outer: outer IPv6 destination address IPv6 source address is 1234::1 IPv4 source address is 123.1.1.1 UDP source port and destination port are 1234 """ p = (IPv6(src='1234::1', dst=dst_outer) / IP(src='123.1.1.1', dst=dst_inner) / UDP(sport=1234, dport=1234)) return p def create_packet_header_IPv6_SRH_IPv4(self, dst, sidlist, segleft): """Create packet header: IPv4 encapsulated in SRv6: IPv6 header with SRH, IPv4 header, UDP header :param ipv4address dst: inner IPv4 destination address :param list sidlist: segment list of outer IPv6 SRH :param int segleft: segments-left field of outer IPv6 SRH Outer IPv6 destination address is set to sidlist[segleft] IPv6 source address is 1234::1 IPv4 source address is 123.1.1.1 UDP source port and destination port are 1234 """ p = (IPv6(src='1234::1', dst=sidlist[segleft]) / IPv6ExtHdrSegmentRouting(addresses=sidlist, segleft=segleft, nh=4) / IP(src='123.1.1.1', dst=dst) / UDP(sport=1234, dport=1234)) return p def create_packet_header_L2(self, vlan=0): """Create packet header: L2 header :param vlan: if vlan!=0 then add 802.1q header """ # Note: the dst addr ('00:55:44:33:22:11') is used in # the compare function compare_rx_tx_packet_T_Encaps_L2 # to detect presence of L2 in SRH payload p = Ether(src='00:11:22:33:44:55', dst='00:55:44:33:22:11') etype = 0x8137 # IPX if vlan: # add 802.1q layer p /= Dot1Q(vlan=vlan, type=etype) else: p.type = etype return p def create_packet_header_IPv6_SRH_L2(self, sidlist, segleft, vlan=0): """Create packet header: L2 encapsulated in SRv6: IPv6 header with SRH, L2 :param list sidlist: segment list of outer IPv6 SRH :param int segleft: segments-left field of outer IPv6 SRH :param vlan: L2 vlan; if vlan!=0 then add 802.1q header Outer IPv6 destination address is set to sidlist[segleft] IPv6 source address is 1234::1 """ eth = Ether(src='00:11:22:33:44:55', dst='00:55:44:33:22:11') etype = 0x8137 # IPX if vlan: # add 802.1q layer eth /= Dot1Q(vlan=vlan, type=etype) else: eth.type = etype p = (IPv6(src='1234::1', dst=sidlist[segleft]) / IPv6ExtHdrSegmentRouting(addresses=sidlist, segleft=segleft, nh=59) / eth) return p def create_packet_header_IPv6_L2(self, dst_outer, vlan=0): """Create packet header: L2 encapsulated in IPv6: IPv6 header, L2 :param ipv6address dst_outer: outer IPv6 destination address :param vlan: L2 vlan; if vlan!=0 then add 802.1q header """ eth = Ether(src='00:11:22:33:44:55', dst='00:55:44:33:22:11') etype = 0x8137 # IPX if vlan: # add 802.1q layer eth /= Dot1Q(vlan=vlan, type=etype) else: eth.type = etype p = (IPv6(src='1234::1', dst=dst_outer, nh=59) / eth) return p def get_payload_info(self, packet): """ Extract the payload_info from the packet """ # in most cases, payload_info is in packet[Raw] # but packet[Raw] gives the complete payload # (incl L2 header) for the T.Encaps L2 case try: payload_info = self.payload_to_info(packet[Raw]) except: # remote L2 header from packet[Raw]: # take packet[Raw], convert it to an Ether layer # and then extract Raw from it payload_info = self.payload_to_info( Ether(scapy.compat.r(packet[Raw]))[Raw]) return payload_info def verify_captured_pkts(self, dst_if, capture, compare_func): """ Verify captured packet stream for specified interface. Compare ingress with egress packets using the specified compare fn :param dst_if: egress interface of DUT :param capture: captured packets :param compare_func: function to compare in and out packet """ self.logger.info("Verifying capture on interface %s using function %s" % (dst_if.name, compare_func.__name__)) last_info = dict() for i in self.pg_interfaces: last_info[i.sw_if_index] = None dst_sw_if_index = dst_if.sw_if_index for packet in capture: try: # extract payload_info from packet's payload payload_info = self.get_payload_info(packet) packet_index = payload_info.index self.logger.debug("Verifying packet with index %d" % (packet_index)) # packet should have arrived on the expected interface self.assertEqual(payload_info.dst, dst_sw_if_index) self.logger.debug( "Got packet on interface %s: src=%u (idx=%u)" % (dst_if.name, payload_info.src, packet_index)) # search for payload_info with same src and dst if_index # this will give us the transmitted packet next_info = self.get_next_packet_info_for_interface2( payload_info.src, dst_sw_if_index, last_info[payload_info.src]) last_info[payload_info.src] = next_info # next_info should not be None self.assertTrue(next_info is not None) # index of tx and rx packets should be equal self.assertEqual(packet_index, next_info.index) # data field of next_info contains the tx packet txed_packet = next_info.data self.logger.debug(ppp("Transmitted packet:", txed_packet)) # ppp=Pretty Print Packet self.logger.debug(ppp("Received packet:", packet)) # compare rcvd packet with expected packet using compare_func compare_func(txed_packet, packet) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise # have all expected packets arrived? for i in self.pg_interfaces: remaining_packet = self.get_next_packet_info_for_interface2( i.sw_if_index, dst_sw_if_index, last_info[i.sw_if_index]) self.assertTrue(remaining_packet is None, "Interface %s: Packet expected from interface %s " "didn't arrive" % (dst_if.name, i.name)) if __name__ == '__main__': unittest.main(testRunner=VppTestRunner)